TiO_2纳米粉体的制备及光催化活性  

Preparation and Photocatalytic Activities of Nanocrystal Titania

作　　者：沈伟韧[1] 贺飞[1] 赵文宽[1] 王怡中[2] 方佑龄[1] 

机构地区：[1]武汉大学化学与环境科学学院,武汉430072 [2]中国科学院生态环境研究中心环境水化学国家重点实验室,北京100085

出　　处：《武汉大学学报（自然科学版）》1999年第4期389-392,共4页Journal of Wuhan University(Natural Science Edition)

基　　金：国家自然科学基金

摘　　要：以钛酸四丁酯为原料，采用溶胶凝胶过程超临界干燥法制备了 Ｔｉ Ｏ２ 纳米粉体，并通过 Ｘ Ｒ Ｄ、 Ｂ Ｅ Ｔ、 Ｔ Ｅ Ｍ 等方法对所得样品进行表征． 制备的 Ｔｉ Ｏ２ 气凝胶具有很高的比表面积（４８８ ｍ ２ ·ｇ－ １），平均粒径为 ４．６ ｎｍ ，具有锐钛矿型晶体结构，经５００℃煅烧２ ｈ 所得的纳米粉体，锐钛矿型晶体结构更为明显，平均粒径６．７ ｎｍ ，比表面积 １５８ ｍ ２ ·ｇ－ １． 将它用于甲基橙溶液的脱色反应。Using titanium tetrabutoxide as the precursor, a nanocrystal TiO 2 aerogel with a high BET surface area of 488 m 2·g -1 and a crystallite size of 4.6 nm was prepared through the sol gel method and supercritical drying(SCD). The characteristics of obtained TiO 2 were studied by TEM, XRD and BET techniques. The photocatalytic activities of the prepared samples were evaluated by measuring the decoloration of methylorange. The sample prepared by SCD shows higher photocatalytic activities compared to two commercial TiO 2 and the powder prepared by titanium alkoxide hydrolysis.

关 键 词：二氧化钛 光催化活性 纳米粉体 制备 

分 类 号：O614.411[理学—无机化学] O643.3[理学—化学]